Crown-articulator



L. COOPERMAN.

CROWN ARTICULATOR.

APPLICATION FILED DEC. 22, 1919.

1,345,433. Patenteamy 6,1920.

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Be it known that LLonis' CooPERMam-a citizenof the, United States, and a resident of the city, county, and State of New York,

have invented new and uSeful' ImproVement in Crowri-Articulators, of which the following is a specification; V V v The object of'my inventionxis to provide a device of thischaracter which may be used in the conventional way, but which may be handled and manipu'lated with greater facility. This object is accomplished'by my invention, one embodiment of which is hereinafter more particularly set forth.

For a more particular description of my invention, reference is to be had tothe accompanying drawings, forming a part here of, in Which- Figurel is a side elevation ofv my improved articulator with-two castings in place. 1

Fig. 2 is a longitudinal section of my improved crown articulator.

Fig. 3 is a plan view of the same.

Fig. 4 is an enlarged sectional view, taken on the line 4-4.0f Fig. 1. V r a Fig. 5 is asectional view, taken on the line 5-5 of Fig.2. V r

Fig.;6 is a modified form and jaw for front teeth, the other figures showing jaws suitable for side teeth.

Throughout the various views of the drawings, similar reference characters designate similar parts.

My improved artlculator 1 is provided with an upper jaw ,2 and a lower jaw 3. which are connected by a pivot 4 from which extends a stem 5 and about which is placed a'spring 6' (see Fig. 2,), which has its ends pressing against the interior of the respective aws so as to hold 'them' against the z wings 7 of a washer 8 placed on'the stem 5 and adjusted to any suitable position by means of a nut 9. For convenience, I preferably provide a second nut 10in which is mounteda ring 11 so that, if desired, the crown articulator may be hung up to be gotten out of the way..

From the foregoing it is obvious that by turningthe nut 9 one way or the other on the stem 5, it is possible to shift the wings 7 in the direction of the axis of the stem 5 and thereby close the jaws 2 and-3' against the tension of the spring 6 or to permit this spring to separate said jaws, according to the direction of movement of'these wings.

v I i v Specification of Letters Patent. i Application filed December 22, 1919. Serial No. 346,544.

mama July 6, 1920.

When these Wings move toward the pivot 4:,

the jaws are brought together and when these wings are taken away from the pivot 4, these-jaws are'separat'ed. From th s, 1t

maybe hadso thatwhen the plaster casting of the teeth .of a jaw-is made in the c011- ventional way and joined to the correspond- 1 ing j aw in a manner which will be described below, theteeth will-be inth elr right ocis apparent that a mici'ometei adjustment clus'al relations. After they have be'en made in-this way the nut 9 should remain in place and'then one jaw may be separated from the other by sliding back the sleeve 12 on the jaw 2 to the position indicated in .dottedlines" in Fig. 2 when the extreme end ofthe jaw may be thrownup on a pivot 7 131501 the purposes of making the proper iuidge'or other work which is made in the conventional manner. v a

The extreme ends of the jaws 2 and 3 are formed by means of curved'plates 1-1 and '15, respectively, each of which has curved edges 16 and a center rib 17 Both of these jaws have suitable shanks 18 which take into suitable recesses where they are held in place by capstan screws, 19, or similar devices. The upper plate 1 1 fits into a socket 20 which has an inner end adjoining the pivot 13 on which it is mounted, and the other shank 18 extends into an opening 21 ii of the jaw 3 which is immediately over an enlarged base 22 which is preferably made integral. with this jaw or substantially so and wide enough to hold the articulator erect. For the purposes of manipulation the sleeve 12 is preferably" provided witha fin 23 which extends laterally therefrom, as shown., a

I In view of the foregoing, the useof my improved crown articulator will be readily understood. Assuming the parts to be as indicated in Fig- 2 and it isidesiredto prepare suitable dentistry, such as crown work, for the'right side of a patient, a casting of the lower aw 24 is put on the plate 15 in the conventional manner and therethe conventional manner, and when a the castings 24 and 25" are together in their proper occlusal relations, the sleeve 12 may he slid back, as indicated above, and then the plate 14 maybe swung on the pivot 13 so as to facilitate a performance of the proper operations. Wheneverdesired this sleeve may be returned and if something is to be added to the teeth between their occluding parts the nut 9 may be manipulated to correspond 7 thevsame, as above set forth.

While I have shown and described one embodiment of my invention, it is obvious that it is not restricted thereto, but is broad enough to cover all structures that come within the scope ofithe annexed claims.

- Having thus described my invention, what I claim'is: V a

1 1. A crown articulator provided with two jaws pivoted together by a pivot, va coil spring about said pivotwith ends extending into said jaws and adapted to separate them, a stem extending from said jaws, a washer mounted on said stem adapted to rest against said jaws in opposition to the ten 1 for receiving castings.

V 2 s V 7 1,345,433

stem for determining the position of the.

Washer and means connected to said jaws 2. A crown articulator, a pair of jaws pivoted together, a spring tending to separate'said aws, means for overcoming the tension of the spring and holding the jaws in fixed relation, plates adapted to receive castings and secured to said jawsand means for permitting one of said plates to be swung about a pivot in its jaw'so that operations vmay be performed on the castings paratus. 1, V 1 j 3. A crown articulator'provided with a pair ofvjaws pivoted together, a spring normally separating said jaws, means for overcoming the tension of the spring and holding the jaws vin fixed relation,',a slidable sleeve mounted on one of said jaws, a pivot concealed by said sleevegso thatthe extreme end of one jaw may be; thrown about the pivot concealed by the sleeve and means for receiving castings at the endsof saidjaws.

LOUIS COOPERMAN.

without disturbingthe initial-set ofthe ap- 

